diff --git a/ui/data.js b/ui/data.js
index 19236e41..c42cec82 100755
--- a/ui/data.js
+++ b/ui/data.js
@@ -46,6 +46,9 @@ var MARKED = []
 
 var IMAGE_CACHE = []
 
+var SETTINGS = {
+}
+
 
 
 /**********************************************************************
diff --git a/ui/index.html b/ui/index.html
index 050e0f9d..0d3a37f9 100755
--- a/ui/index.html
+++ b/ui/index.html
@@ -300,6 +300,8 @@ DEBUG = true
 // setup...
 $(function(){
 
+	toggleTheme('light')
+
 	//setElementOrigin($('.ribbon-set'), 'top', 'left')
 
 	if('DATA' in localStorage){
diff --git a/ui/modes.js b/ui/modes.js
index 714c7890..a0ec651e 100755
--- a/ui/modes.js
+++ b/ui/modes.js
@@ -24,6 +24,13 @@ var toggleSingleImageMode = createCSSClassToggler('.viewer',
 		})
 
 
+var toggleTheme = createCSSClassToggler('.viewer',
+		[
+			'dark',
+			'gray',
+			'light'
+		])
+
 
 
 /**********************************************************************